and short of breath Andy and Ruby were the first to reach the top of Mount Tai. A. To be

问题补充：

and short of breath, Andy and Ruby were the first to reach the top of Mount Tai.

A. To be tried

B. Tired

C. Tiring

D. Being tired

答案：

A. To be tried

(答案→)B. Tired

C. Tiring

D. Being tired

解析：首先要注意tired与tiring的意思有区别：前者表示“感到疲劳的”，后者表示“令人疲劳的”或“累人的”，根据句意，显然不宜用tiring，故可排除C；由于是与形容词短语short of breath相并列，所以应选形容词tired。句意为：虽然累得上气不接下气，但安迪和鲁比是最先到达泰山山项的。